He lifts a signal flag for a distant nation, ¹  he whistles for it to come from the far regions of the earth. Look, they ²  come quickly and swiftly.

Here is a message about Egypt: Look, the Lord rides on a swift-moving cloud and approaches Egypt. The idols of Egypt tremble before him; the Egyptians lose their courage. ¹ 

You say, ‘No, we will flee on horses,’ so you will indeed flee. You say, ‘We will ride on fast horses,’ so your pursuers will be fast.